Had 2000 OX66 225s and they ran great. Just had to keep up with maintenance - clean 02 sensors, change filters, vst filters, low pressure pumps and a few other things. Had some shaking on one which turned out to be a bad O2 sensor even though it tested fine. If they haven't been replaced, they are overdue. I never used ethanol and we really never had a problem except for having to replace the counter-rotating lower unit. Not a bid deal but it made us turn around on a trip offshore. I have a 330 and the 30 is great. Trying to sell my 227 sailfish if you or anyone reading this knows of someone looking for a great boat. BTW - mileage wasn't bad for the ox66s. Loved that boat and engines - although they did smoke a little.